1758655 - 10.19 - 2.56% expedia FirstVisualChange / expedia LastVisualChange + 3 more (Linux) regression on Fri February 25 2022

Status: RESOLVED INVALID

(Core :: Graphics, defect)

Description

[Alexandru Ionescu (needinfo me) [:alexandrui]]

Perfherder has detected a browsertime performance regression from push c13e08d09a585877a0eee0f93a771b7b767ad16b. As author of one of the patches included in that push, we need your help to address this regression.

Regressions:

Ratio	Test	Platform	Options	Absolute values (old vs new)
10%	expedia FirstVisualChange	linux1804-64-shippable-qr	cold fission webrender	322.67 -> 355.00
5%	expedia ContentfulSpeedIndex	linux1804-64-shippable-qr	cold fission webrender	453.17 -> 474.56
3%	expedia PerceptualSpeedIndex	linux1804-64-shippable-qr	cold fission webrender	1,112.57 -> 1,145.88
2%	expedia LastVisualChange	linux1804-64-shippable-qr	cold fission webrender	2,428.24 -> 2,480.00

Improvements:

Ratio	Test	Platform	Options	Absolute values (old vs new)
10%	expedia FirstVisualChange	linux1804-64-shippable-qr	cold fission webrender	360.00 -> 323.33
5%	expedia ContentfulSpeedIndex	linux1804-64-shippable-qr	cold fission webrender	484.43 -> 457.83
5%	expedia SpeedIndex	linux1804-64-shippable-qr	cold fission webrender	555.86 -> 527.67
4%	expedia PerceptualSpeedIndex	linux1804-64-shippable-qr	cold fission webrender	1,162.86 -> 1,119.92
3%	expedia LastVisualChange	linux1804-64-shippable-qr	cold fission webrender	2,514.29 -> 2,450.00

Details of the alert can be found in the alert summary, including links to graphs and comparisons for each of the affected tests. Please follow our guide to handling regression bugs and let us know your plans within 3 business days, or the offending patch(es) will be backed out in accordance with our regression policy.

For more information on performance sheriffing please see our FAQ.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

Set release status flags based on info from the regressing bug 1757189

Comment 2

[Donal Meehan [:dmeehan]]

:bhood could this be triaged, any action for 99?

Comment 3

[Bob Hood [:bhood]]

Reached out to Randell directly. Hopefully he'll have some insights on why his patch caused the regression.

Comment 4

[Alexandru Ionescu (needinfo me) [:alexandrui]]

The metrics are mirrored and giving the graph value excluding outliars is contant 360 I will close this as invalid.